We Pescatarians are growing in number. It is a true cutting edge healthy eating breakthrough. To eschew red meat and the flesh of other mammals is a good thing and at some level we all know this. Sustainable fish and shell fish and vegetables and fruits are so good for our bodies.
Fad diets and off the wall eating plans will never survive and we all know it. How many times have you tried it yourself or seen someone else fail or the whole silly idea go away-Spinach and grapefruit, raw vegan, Keto, liquid only, etc. all may last a while, but good health and sustainability are the only true lasting tests of good nutrition.
Do it for yourself, the planet, and the assurance of a longer more physically fit life.